can anyone help me to complete this code

this code is for generating a text watermark.the code mentioned below reads the text file, and finds the frequently occurring word in it which i named kw.now what i want to do is to make a function that counts the no of characters in a preceding and next word to the keyword(kw) each time kw occurs in the text file. can i get any help about this... fid = fopen('hello.txt');

    text = textscan(fid,'%s'); 

    fclose(fid);

    text = lower(text{:});

    Nwords = numel(text);

    [uniqueWords, numericIDs, wordOrder] = unique(text);

    numel(uniqueWords);

    counts = histc(wordOrder,1:numel(uniqueWords));

    [frequency,order] = sort(counts,'descend');

    freqcell = num2cell(frequency);

    sortedWords = uniqueWords(order);

    display([sortedWords(1:3),freqcell(1:3)]);

    kw=sortedWords(1);

    kwcount=freqcell(1);

    disp(kw);